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- Heinrich_Daniel_Ruhmkorff abstract "Heinrich Daniel Ruhmkorff (Rühmkorff) (January 15, 1803 in Hanover – December 19, 1877 in Paris) was a German instrument maker who commercialised the induction coil (often referred to as the Ruhmkorff coil.)Ruhmkorff was born in Hanover. He changed the "ü" to "u" in his name when living abroad. After an apprenticeship with a German mechanic, he moved to England. Biographies say that he worked with the inventor Joseph Bramah, but this is unlikely since Bramah died in 1814. He may, though, have worked for the Bramah company. In 1855, he set up a shop in Paris, where he gained a reputation for the high quality of his electrical apparatus.Although Ruhmkorff is often credited with the invention of the induction coil, it was in fact invented by Nicholas Callan in 1836. Ruhmkorff's first coil, which he patented in 1851, utilized long windings of copper wire to achieve a spark of approximately 2 inches (50 mm) in length. In 1857, after examining a greatly improved version made by an American inventor, Edward Samuel Ritchie, Ruhmkorff improved his design (as did other engineers), using glass insulation and other innovations to allow the production of sparks more than 30 centimetres long. Ruhmkorff patented the first version of his induction coil in 1851, and its success was such that in 1858 he was awarded a 50,000-franc prize by Napoleon III for the most important discovery in the application of electricity. He died in Paris in 1877.".
- Heinrich_Daniel_Ruhmkorff birthDate "1803-01-15".
- Heinrich_Daniel_Ruhmkorff birthYear "1803".
- Heinrich_Daniel_Ruhmkorff deathDate "1877-12-20".
- Heinrich_Daniel_Ruhmkorff deathYear "1877".
- Heinrich_Daniel_Ruhmkorff thumbnail Ruhmkorff_coil.png?width=300.
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- Heinrich_Daniel_Ruhmkorff dateOfBirth "1803-01-15".
- Heinrich_Daniel_Ruhmkorff dateOfDeath "1877-12-20".
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- Heinrich_Daniel_Ruhmkorff name "Ruhmkorff, Heinrich Daniel".
- Heinrich_Daniel_Ruhmkorff shortDescription "German inventor".
- Heinrich_Daniel_Ruhmkorff description "German inventor".
- Heinrich_Daniel_Ruhmkorff description "German inventor".
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- Heinrich_Daniel_Ruhmkorff subject Category:German_inventors.
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- Heinrich_Daniel_Ruhmkorff comment "Heinrich Daniel Ruhmkorff (Rühmkorff) (January 15, 1803 in Hanover – December 19, 1877 in Paris) was a German instrument maker who commercialised the induction coil (often referred to as the Ruhmkorff coil.)Ruhmkorff was born in Hanover. He changed the "ü" to "u" in his name when living abroad. After an apprenticeship with a German mechanic, he moved to England. Biographies say that he worked with the inventor Joseph Bramah, but this is unlikely since Bramah died in 1814.".
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- Heinrich_Daniel_Ruhmkorff label "Heinrich Daniel Ruhmkorff".
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- Heinrich_Daniel_Ruhmkorff label "Heinrich Daniel Ruhmkorff".
- Heinrich_Daniel_Ruhmkorff label "Heinrich Daniel Rühmkorff".
- Heinrich_Daniel_Ruhmkorff label "Румкорф, Генрих Даниэль".
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- Heinrich_Daniel_Ruhmkorff givenName "Heinrich Daniel".
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- Heinrich_Daniel_Ruhmkorff name "Heinrich Daniel Ruhmkorff".
- Heinrich_Daniel_Ruhmkorff name "Ruhmkorff, Heinrich Daniel".
- Heinrich_Daniel_Ruhmkorff surname "Ruhmkorff".
